Because Big Media is all about communist propaganda.
Left and right are relative terms. Left is left relative to where you stand. The media in this country are far further left on an absolute basis than some of the politicians they shill for.
As such, centrists are on the right, and conservatives are far right. The orthodox are simply insane.
Us vs Them is an absolute measurement, and I prefer it. Why is the media anti-citizen, anti-American, anti-peace, anti-law and order, anti-God, anti-military, anti-prosperity, anti-white?
So much easier to discuss on that basis, and so much harder for the media to refute.